With Measles Outbreaks in World Cup Host Countries, Brazil Fears Reintroduction of The Virus
Key takeaways
- Just over a month before the tournament, Mexico has recorded 9,207 cases — compared with just seven in 2024 — and is the epicenter of the disease in North America.
- Brazil, considered measles-free, has recorded just three cases in 2026.
- Experts warn that adults with incomplete vaccination schedules are the most vulnerable group among fans.
Why this matters: an international story with cross-border implications worth tracking.
Just over a month before the tournament, Mexico has recorded 9,207 cases — compared with just seven in 2024 — and is the epicenter of the disease in North America. The United States has 1,730 cases, after 2,144 in 2025, amid vaccine skepticism from the country’s top health authority. Canada has recorded 871 cases and has lost its measles-free status.
Brazil, considered measles-free, has recorded just three cases in 2026.
Experts warn that adults with incomplete vaccination schedules are the most vulnerable group among fans. The simultaneous return of infected individuals to different regions of the country would complicate epidemiological surveillance and could trigger local outbreaks. Pre-travel vaccination is seen as the main preventive strategy.